A display includes: a display panel including a display surface; a frame including a cover part which partially faces the display surface; and a film whose fixing area is fixed to the cover part and which is arranged between the display surface and the cover part. The cover part includes a flat part and a stepped part which projects toward the display surface, and the film comes in contact with the display surface to be bent.
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1. A display comprising:
a display panel including a display surface;
a frame including a cover part which partially faces the display surface; and
a film whose fixing area is fixed to the cover part and which is arranged between the display surface and the cover part,
wherein the cover part includes a flat part and a stepped part which projects toward the display surface, and the stepped part comprises a bent portion of the frame, and
wherein the film is fixed to the flat part and comes in contact with the stepped part and the display surface so as to be bent at an angle.
21. A display, comprising:
a display panel including a display surface;
a frame including a cover part which partially faces the display surface; and
a film whose fixing area is fixed to the cover part and which is arranged between the display surface and the cover part,
wherein the cover part includes a flat part and a stepped part which projects toward the display surface, and the stepped part comprises a bent portion of the frame, and
wherein the film is fixed to the flat part and comes in contact with the stepped part and the display surface so as to be bent at an angle,
wherein the film is fixed to the frame by an adhesive.
2. The display according to
3. The display according to
wherein a distance between the flat part and the display surface is less than a sum of a height of the stepped part and a thickness of the film, and
wherein the film comes in contact with the display surface so as to be bent thereby between the flat part and the display surface.
4. The display according to
5. The display according to
wherein a distance between the flat part and the display surface is less than a sum of a height of the stepped part and a thickness of the film, and
wherein the film comes in contact with the display surface so as to be bent thereby between the flat part excluding an area to which the fixing area is fixed and the display surface.
6. The display according to
7. The display according to
wherein an area around the opening faces a frame-shaped area with a predetermined width which is an edge part of the display surface, and
wherein the stepped part is located in a whole area of the area around the opening.
8. The display according to
wherein an area around the opening faces a frame-shaped area with a predetermined width which is an edge part of the display surface,
wherein a first flat part is located in a whole area of the area around the opening, and
wherein the stepped part is located so as to surround the first flat part.
9. The display according to
10. The display according to
wherein the fixing area is fixed to the second flat part.
12. The display according to
wherein an area around the opening faces a frame-shaped area with a predetermined width which is an edge part of the display surface, a first flat part is located in a whole area of the area around the opening,
wherein the stepped part is located so as to surround the first flat part, and
wherein the film comes in contact with the display surface so as to be bent thereby between the first flat part and the display surface.
13. The display according to
wherein an area around the opening faces a frame-shaped area with a predetermined width which is an edge part of the display surface,
wherein a first flat part is located in a whole area of the area around the opening,
wherein the stepped part is located so as to surround the first flat part,
wherein a second flat part is located so as to surround the stepped part,
wherein the fixing area is fixed to the second flat part, and
wherein the film comes in contact with the stepped part, and comes in contact with the display surface between the first flat part and the display surface.
15. The display according to
16. The display according to
17. The display according to
18. The display according to
19. The display according to
20. The display according to
wherein the stepped part and the cover part comprise a same material.
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This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2007-131364, filed on May 17, 2007, the disclosure of which is incorporated herein in its entirety by reference.
1. Technical Field
The present invention relates to a display, and in particular, to a display having a display panel, a frame, and a film arranged therebetween.
2. Background Art
A liquid crystal display (LCD) features thin and light body, and low power consumption. Therefore, an LCD is widely used in office automation equipment, audio visual equipment, a portable terminal device and the like. An LCD mainly includes a backlight, a liquid crystal panel in which a liquid crystal is sandwiched between a pair of substrates that face each other, a front frame and a rear frame which hold these members, and a case such as a chassis.
The LCD may include a buffer material in a gap between the liquid crystal panel and the front frame in order to prevent dust invasion and/or leakage of lights through the gap. The buffer material applies a load to the liquid crystal panel to cause display unevenness. Thus, a quality level of display is deteriorated. A patent document 1 (Japanese Patent Application Laid-Open No. 2006-195146) discloses a device which can achieve the prevention of dust invasion and light leakage to prevent display deterioration, as shown in
In an LCD 1 shown in
In an LCD 1 shown in
Additionally, a patent document 2 (Japanese Patent Application Laid-Open No. 1996-241044) discloses an LCD which includes a solid silicone rubber for preventing invasion of foreign substances.
An exemplary object of the invention is to provide a display that can obtain a stable effect of prevention on dust invasion.
A display according to an exemplary aspect of the invention includes: a display panel including a display surface; a frame including a cover part which partially faces the display surface; and a film whose fixing area is fixed to the cover part and which is arranged between the display surface and the cover part, and the cover part includes a flat part and a stepped part which projects toward the display surface, and the film comes in contact with the display surface to be bent.
Exemplary features and advantages of the present invention will become apparent from the following detailed description when taken with the accompanying drawings in which:
Exemplary embodiments of the present invention will now be described in detail in accordance with the accompanying drawings.
An LCD of the first exemplary embodiment of the present invention will be described with reference to
As shown in
The liquid crystal panel 6 includes a substrate (referred to as “TFT substrate”) on which a switching element such as a TFT (thin film transistor) is formed, another substrate (referred to as “CF substrate”) on which a color filter, a black matrix and the like are formed, and a liquid crystal sandwiched between the substrates.
The backlight unit 8 includes a light source 9, a light guide plate 4, an optical sheet 5 having an optical function, and a chassis 3 and a rear frame 2 which hold the light guide plate 4 and the optical sheet 5. A CCFL (Cold Cathode Fluorescent Lamp) or the like is used for the light source 9. The light guide plate 4 is formed with a material such as PMMA (Polymethylmethacrylate).
The liquid crystal panel 6 is fixed on the backlight unit 8 with a buffer material 53 provided on the chassis 3. The front frame 7 covers the liquid crystal panel 6, the chassis 3 of the backlight unit 8. As shown in
As shown in
The front frame 7 is shaped so that the inside part 10b of the film 10 comes in contact with the display surface of the liquid crystal panel 6 when the front frame 7 and the liquid crystal panel 6 are assembled. In
A height h, a width and a shape of the stepped part 7a are not limited to an example shown in
An LCD of the exemplary embodiment is characterized by a structure of the front frame 7, a position to which the film 10 is fixed to within the front frame 7 and a configuration in which the film 10 comes in contact with the liquid crystal panel 6 and the front frame 7.
The film 10 needs to be arranged in a route through which a dust deteriorating display quality invades a screen display area. The route of dust invasion is a path from an outside of the LCD 1 to an inside of the LCD 1 through a gap between the liquid crystal panel 6 and the front frame 7. Accordingly, a shape of the film 10 is not limited to the frame-shaped form shown in
A material of the film 10 needs to be a transformable material. For example, plastics such as PET (polyethylene terephthalate) can be used. The film 10 composed of a flexible material can certainly contact with the liquid crystal panel 6. In order to reduce a load which the film 10 applies to the liquid crystal panel 6 when the film 10 comes in contact with the liquid crystal panel 6, it is desirable that the film 10 is set to be about 25 μm to 100 μm in thickness. Furthermore, it is desirable that a location in the liquid crystal panel 6 to which the film 10 applies a load is set to only the stepped part 7a. Accordingly, it is desirable that the thickness of the film 10 including the thickness of an adhesive is smaller than a distance between the flat part 7b and the liquid crystal panel when the liquid crystal panel 6 and the front frame 7 are assembled. An amount of a light transmitting through the film 10 is large, when the thickness of a film material is less than 25 μm. Thus, a light leakage preventing power is degraded. Because a stiffness of the film 10 is low, distortion or wrinkle easily occurs and shape stability is degraded. As described above, a minimum thickness needs to be about 25 μm. Any color of the film 10 is available. In order to secure light shielding or make the film 10 less noticeable, a black or gray film may be desirably selected.
In the above-mentioned exemplary embodiment, the stepped part 7a is formed along the shape of opening 7c of the front frame 7. When the stepped part 7a is formed at a position that is closer to the opening 7c than a position of the front frame 7 on which the film 10 is fixed, the same effect as that of the above-mentioned exemplary embodiment can be obtained. For example, as shown in
As shown in
In the LCD 1 of the exemplary embodiment, the film 10 is inserted between the front frame 7 and the liquid crystal panel 6. The stepped part 7a that projects toward a display surface of the liquid crystal panel 6 is provided on the front frame 7. By bending the front frame 7, the stepped part 7a is formed with high accuracy. Accordingly, the film 10 certainly comes in contact with the liquid crystal panel 6, and variation of a load applied to the liquid crystal panel 6 is decreased. Since the film 10 is fixed to the front frame 7, a gap between the front frame 7 and the liquid crystal panel 6 is filled by the film 10. Thus, the LCD 1 of the exemplary embodiment prevents deterioration of display quality and furthermore can effectively prevent dust invasion and light leakage. Additionally, in the LCD 1 of the exemplary embodiment, because bending the film 10 is not required, production cost of the film 10 is reduced.
An LCD of the second exemplary embodiment of the present invention will be described with reference to
In an LCD of the first exemplary embodiment, the stepped part 7a is provided to the front frame 7, and the stepped part 7a bends the inside part 10b of the film 10. In a display of the present invention, a film fixed to a front frame has only to come in contact with a display panel, or to come in contact with a display panel and then be transformed.
For example, as shown in
A display of the third exemplary embodiment of the present invention will be described with reference to
As shown in
As mentioned above, in a display of the third exemplary embodiment, a film comes in contact with an edge part of the liquid crystal panel 6. Therefore, the display has the same effect as that of the first and the second exemplary embodiments.
In a structure of each above-mentioned exemplary embodiment, the film 10 is fixed on a rear face of the front frame 7 that faces the liquid crystal panel 6 along all sides of the rectangular liquid crystal panel 6. A structure of the present invention is not limited to that of the above-mentioned exemplary embodiment, and only a part on which dust invasion and/or light leakage is likely to occurs may be filled (e.g. only a particular part of any one side among all sides of the liquid crystal panel 6).
The present invention is characterized by the front frame 7 and the film 10. A structure and/or a shape of other members are not limited. Any drive system can be used for a liquid crystal panel. For example, an IPS (In Plane Switching) system, a TN (Twisted Nematic) system or a VA (Vertical Alignment) system can be used. Any type and any structure can be used for a switching element. A positive stagger type or a reverse stagger type can be used.
A display panel used for a display of the present invention is not limited to a liquid crystal panel. The present invention can also be applied to a display panel other than a liquid crystal panel. For example, the invention can be applied to a display panel such as a CRT (Cathode-ray tube), a plasma display and an organic EL (electroluminescence) display. By applying the present invention, a dust invasion prevention effect can be obtained for any type of display panel. In a display using a backlight, a light leakage prevention effect can be obtained. In an LCD in which display quality is deteriorated due to a load applied to a display surface, deterioration of display quality can be prevented.
The present invention can be also used for any apparatus having a display panel in which a gap between a member such as a display panel and a chassis such as a front frame has to be filled without applying an excessive load to a display surface.
In an LCD described in the patent document 1 shown in
In an LCD described in the patent document 1 shown in
In an LCD disclosed in the patent document 1, a gap between the front frame and the liquid crystal panel is filled with a film. In the LCD, the film is bent, or the film is fixed on the front frame with a thick adhesive double coated tape. However, the above-mentioned LCD cannot sufficiently prevent deterioration of display quality due to a load to the liquid crystal panel. The LCD does not includes stable dust invasion prevention effect and/or light leakage prevention effect. A bending process for a film and an adhesive double coated tape increase a cost of the LCD.
In a structure of the first exemplary embodiment (
In a structure of the second exemplary embodiment (
Further, an LCD using a solid silicone rubber is disclosed in the patent document 2. In the LCD, the thickness of an LCD is large by an amount of thickness of the solid silicone rubber fixed between a shield case and an LCD panel. When fixing the solid silicone rubber between the shield case and the LCD panel, a predetermined gap has to be set between the solid silicone rubber and the LCD panel so as not to influence display quality of the LCD panel. However, even if hardness of the solid silicone rubber is decreased, display quality is deteriorated when the solid silicone rubber comes in contact with an LCD panel.
In contrast, in a display of the present invention, a gap between the front frame 7 and the liquid crystal panel 6 is larger than the thickness of the film 10, and constant so that the film 10 comes in contact with the liquid crystal panel 6 when the front frame 7 and the liquid crystal panel 6 are assembled. The film 10 of a thin type which does not affect display quality of the liquid crystal panel 6 when the film 10 comes in contact with the liquid crystal panel 6 is provided in the gap. Because it is not necessary to increase the thickness of the LCD by an amount of thickness of the solid silicone rubber, a display of the present invention can be made thin.
While the invention has been particularly shown and described with reference to exemplary embodiments thereof, the invention is not limited to these embodiments. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the claims.
Further, it is the inventor's intention to retain all equivalents of the claimed invention even if the claims are amended during prosecution.
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Apr 24 2008 | SUGAWARA, HIDEAKI | NEC LCD Technologies, Ltd | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 020965 | /0645 | |
May 06 2008 | NLT TECHNOLOGIES, LTD. | (assignment on the face of the patent) | / | |||
Jul 01 2011 | NEC LCD Technologies, Ltd | NLT TECHNOLOGIES, LTD | CHANGE OF NAME SEE DOCUMENT FOR DETAILS | 027190 | /0060 |
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